Hanuman Chalisa Was composed by Tulsidas, a 16th-century poet-saint who was also a philosopher and reformer. Tulsidas is also renowned because the composer of Ramcharitmanas for his devotion to Shri Rama. It is actually recognized that Tulsidas would recite the Hanuman Bahuka to treatment himself of his critical arm ailment; https://www.youtube.com/watch?v=ufkmD95y7fE&t=1s